It is equal to 50*900*2*4*15, = 5400000 . Why? We’ll, our school hands out these booklets, each has two volumes, with four books, around 50 pieces of paper each, and there are 900 students, and our school existed for 15 years, so, the total use of paper is this number, and the reason it is a waste is because the paper ends up disappearing and it becomes impossible to find, then, it will be thrown basically immediately after the term. And that’s only one subject. I call it the waste number.